glossary P

Pneumatictire is described as a circular tube of rubber or synthetic rubber and fabric, and sometimes also steel, attached to the rim of the car's wheel, having resilience due to its containing air under pressure.

The term plywood refers to a type of structural material that is composed of multiple layers (orplies) of wood veneer that are stuck together in such a way as to ensure that the wood grain of the adjoining layers are at right angles to each other, thus making the resulting material stronger and more resistant to warping or other deformities.

Platinum pertains to one of the three precious metals along with gold and silver, platinum is the rarest of them all. It is harder than the other precious metals and has a higher melting point, making it difficult to alloy and work with.